<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .wrapper {
            display: flex;
            flex-direction: column;
            align-items: center;
            width: 400px;
        }
    </style>
</head>
<body>
    <div class="wrapper">
        <div style="width: 100px;height: 100px; border: 1px solid #ccc;align-self:self-start"></div>
        <div style="width: 100px;height: 100px; border: 1px solid #ccc; align-self: center;"></div>
        <div style="width: 100px;height: 100px; border: 1px solid #ccc;align-self: self-end;"></div>
    </div>
</body>
</html>